[pt_BR]Hide doc v1, support, about and contribute links on homepage

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
[pt_BR]Improve translation on header.html

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Merge pull request #23 from rogeriopradoj/master

[pt_BR] Update homepage